Molding-machine.



PATENTED OCT. 16-, 1906.

J. T. ROWLANDS. MOLDING MACHINE. APPLICATION FILED DEC. 8. 1905.

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PATENTED 001216, 1906.

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' JOHN '1. ROVVLANDS, OF RAOINE, WISCONSIN.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed December 8I 1905. Serial No. 290,395.

To all whom it may concern:

' Be it known that 1, JOHN T. RowLANns, residing in Racine, in the county of Racine'and State of Wisconsin, have invented new and useful Improvements in Molding-Machines,

of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This inventionrelates to molding-machines, and has for its object to provide a machine for supporting a flask and attern while the mold is being formed and w 'ch will be capable of drawing the pattern downwardly from the mold, leaving the flask with the completed mold free to be removed and placed in use for molding in the usual manner.

Another object of this invention is to pro' vide for an accurate adjustment of the pattern-support, so that the various patterns with which the machine may be used will be moved upwardly into the flask to the proper extent in each particular instance.

Another object of this invention is to adjust the degree of drop of the pattern-support so that the pattern may be fully withdrawn from the mold without being lowered more than is necessary for that purpose.

With the above and other objects in view .the invention consists in the molding-machine herein shown and described, the combinations of parts, and all equivalents.

Referring to the accompanying drawings, in which like characters of reference indicate the same parts in the several views, Figure 1 is an elevation of a molding-machine constructed in accordance with this invention. Fig. 2 is a central sectional elevation thereof. Fig.3 is a plan view thereof. Fig. 4 is a transverse sectional view on the line 4 4 of Fig. 1, parts being sectioned and the connecting-rod being removed; and Fig. 5 is a longitudinal sectional view of the adjustable latch for the operating-lever.

In the drawings, 8 represents a base or pedestal which may be of any desirable form, either stationary or movable, and which is preferably tubular at its upper part to con- Radial arms 10 project support for the flask during the operation of forming the mold therein.

Slidably fitting in the cylinder 9 is a plunger or trunk-stem 14, on whose upper closed end is mounted a pattern-supporting table 15, with a central opening fitting upon the end of the plunger against a shoulder 16 thereof. The table 15 is preferably of the shape of the head-frame and comprises a slotted rim portion connected by slotted radial iportions with the central hub portion, which ts upon the reduced upper end of the plunger and is preferably fastened thereto by a key 17. The various slots of the table form convenient openings for the passage of cla1nping-bolts to securely mount a pattern thereon.

A shaft 18 is j ournaled through the lower portion of the base 8, preferably in an offset 19 thereof, and has -fixed on it, inside of the base, a double crank-arm 20, which is connected to the plunger by means of a connecting-rod 21, pivoted to inwardly-projecting studs 22, formed in the plunger 14. The lower end of the plunger is cut away at 23 to receive the crank-arm 21 and permit of the movement of the plunger and the crank-arm without interference. When the shaft 18 is turned to move the double crank-arm 20 upwardly, the plunger 14 is lifted by means of the connecting-rod 21, and when the shaft is turned in the opposite direction the plunger and the pattern supported thereby are lowered again, the plunger sliding in the cylinder 9, serving as a cross-head or the connectingrod.

A collar 24 is fixed on the shaft 18outside of the base 8, and a lever-arm 25 is loosely mounted on said shaft to be adjustable, but may be clutched to the fixed collar 24 by means of intermeshing teeth 26 on the meeting faces of these parts, a nut 27, threaded on the end of the shaft, serving to clamp them into engagement. The fixed collar 24 is provided with a'reduced portion 28, surrounded by a loose split ring 29, which may be may be varied, so that the lower position of IIO the pattern-support may be made nearer to or farther from the level of the flask-support.

Some patterns being deeper than others are required to be lowered to a greater extent in order to free them from the mold, while with shallow patterns it is desirable that they should not be lowered more than necessary to remove them from the mold,

The lever-arm 25 is preferably bent outwardly, as shown, and an adjustable handle 33 is provided therefor with its stem portion 34 slidable through an opening in the straight upper portion of the lever-arm and clamped in its adjustments by a set-screw 35. In this manner the operating-lever may be extended or shortened, as desired, to vary the leverage.

The lower ring 11 of the head-frame of the flask-support is provided with a downwardlyextending bracket 36, which is desirably formed integral therewith. To this bracket is secured a plate 37, having outstanding ears 38, with a latch-lever 39 pivoted therebetween, said lever being pressed outwardly by means of a coil-spring 40, mounted on bosses projecting from the plate and. lever. The lever 39 has a projection 41 at its inner end to strike against the plate 37 and limit its outward movement, and a stop-lug 42 on the outer end of the lever 39 stands in the path of the lever-arm 25, so as to limit its swing in the direction for lifting the pattern-support. The lever 39 has a longitudinal slot 43, in which is slidably mounted a cam-shaped latch-lug 44, whose lateral shoulders engage the lever 39 on opposite sides of the slot and cooperate with a nut 45, threaded on the rear end of the lug, to securely clamp said lug in its adjusted positions in the slot.

In order that the position of the lug 44 may be changed, a screw 46 is passed loosely through the end of the latch-lever 39 and threads through the lug 44, so that by turning the screw the lug will be forced along the slot nearer to or farther from the stop 42.

The lug 44 is in the path ofthe hand-lever 25 and is engaged on its cam-surface thereby to force the lateh-lever 39 inwardly against the pressure of spring 40 until said handlever passes said lug and is limited in its further movement by engaging the stop 42. When the hand-lever is released, the weight of the pattern-support tends to return it to its lower position; but the lug 44, standing in its path, prevents it from moving beyond, and thus determines the upper position of the pattern-support. A projection-47 is formed on the latch-lever 39, by which said lever may be moved by hand or otherwise to remove I the. lug 44 from engagement with the handment which is produced by changing the position of the lug 44 by means of the screw 46. In operation a pattern is secured to the pattern support or table 15, and the upper position thereof with relation to the flask-support 12 is determined, first, approximately by means of the adjustment of the hand-lever 25 upon the fixed collar 24 of shaft 18, and then more accurately by means of the adjustment of the lug 44 by the screw 46. Then the lower position ofthe pattern-support is determined by the adjustment of the split ring upon the reduced portion 28 of the fixed collar 24, and the machine is ready for operation. A flask is placed upon the flasksupport 12 and may be secured there in any desirable manner, and the pattern-support is raised therein by lifting the hand-lever 25 until it is engaged and held by the lug 44. Now the pattern is in its proper position within the flask, and the flask may be packed with sand to form the mold in the usual manner. When this operation is completed, the handlever 25 is released by swinging the lug 44 out of its path by pressure upon the projection 47 and the pattern is lowered by lowering the handle, the engaging stops 31 and 32 determining the lower position thereof. In this lower position of the pattern-support the pattern is entirely free from the mold, and the flask may be removed and another substituted to repeat the operation.

It is obvious that the operation of the adjusting and locking mechanism for the hand-lever does not depend upon the form and construction of the other parts; but it may be applied to various other types of molding-machines without departing from this invention.

What I claim as my invention is 1. In a molding-machine, a stationary. flask support, a pattern support movable with relation thereto, a shaft for moving the pattern-support, an operating-lever connected with the shaft, a latch-lever in the path of the operating-lever, a cam-lug slidably mounted in a slot of the latch-lever, a screw passing through the latch-lever and threaded in the lug by which the lug may be adjusted in its position on the latch-lever, and means for clamping the lug in its adjusted position, said lug serving to engage the operating-lever and determine the position of the pattern-support.

2. In a molding-machine, a stationary fiask support, a pattern support movable with relation thereto, a shaft for moving the pattern-support, an operating-lever connected with the shaft, a latch-lever in the path of the operating-lever, a stop on the latch-lever f for engaging the operating-lever and limiting its movements, a cam-lug slidably mounted in a slot of the latch-lever, a screw passing through the latch-lever and threaded in the lug, and a nut threaded on the lug to clamp it in its adjusted positions on the latch-lever, said lug being adapted to engage the operating-lever and determine the position of the pattern-support.

3. In a molding-machine, a stationary flask-support, a pattern-support movable with relation thereto, a shaft for moving the pattern-support, an operating-lever on the shaft, a suitably-mounted plate, a latch-lever pivoted thereto, a spring bearing on the plate and the latch-lever, a projection on the latch lever engaging the plate for limiting the outward positionthereof, a shouldered cam-lug slidable in a slot of the latch-lever and standing in the path of the operating-lever, a stop on the latch-lever for limiting the movement of'the operating-lever, and a screw passing through the latch-lever and threaded in the slidable lug for adjustingsaid lug and thereby determining the position of the patternsupport.

4. In a molding-machine, a stationary flask support, a pattern support movable with relation thereto, a shaft for moving the pattern-support, an operating-lever on the shaft, a suitably-mounted plate, a pair of cars projecting therefrom, a latch-lever pivoted between the ears, a coil-spring mounted upon lugs on the plate and the latch-lever for pressing the latch-lever outwardly, a lug on the latch-lever for engaging the plate and limiting the outward movement of the latch-lever, a shouldered cam-lug slidable in a slot of the latch-lever, a nut threaded thereon clamping the lug in position, said shouldered lug being in the path of movement of the operating-lever, a stop on the latch-lever for limiting the flask support, a pattern support movable with relation thereto, a shaft for moving the pattern-support, an operating-lever having an adjustable engagement with the shaft, a spring-pressed latch-lever in the path of the operating-lever, a stop on the latch-lever for engaging the operating-lever and limiting its movements, and a cam-lug adjustably mounted on the latch-lever and adapted to be passed by the operating-lever when moving in one direction and to engage the operatinglever and prevent its movement in the opposite direction, the adjustment of the operating-lever with relation to the shaft producing a coarse adjustment in the positioning of the pattern-support with relation to the flasksupport, and the adjustment of the cam-lug producing a fine adjustment in the ositioning of the pattern-support with re ation to the flaslosupport.

In testimony whereof I afiiX my signature in presence of two witnesses.

JOHN T. ROWLANDS. 

